minimum and currents has its maximum value
Hence at resonance ωL = 1 / ωC or ω = 1 / √LC---( 21) But ω = 2πf where f is the frequency of applied voltage. Therefore f 0 = 1 / 2π√LC---( 22) This frequency is called resonant frequency of the circuit and peak current in this case is i 0 = V 0 / R and reactance is zero
�
�
We will now define resonance curves which shows the variation in circuit current( peak current i 0) with change in frequency of the applied voltage
Figure below shows the shape of resonance curve for various values of resistance R
�
�
For small value of R, the resonance is sharp which means that if applied frequency is lesser to resonant frequency f 0, the current is high otherwise
For large values of R, the curve is broad sided which means that those is limited change in current for resonance and non-resonance conditions